释义
n. 蛋黄
例句
1. The yolk is the yellow part in an egg. 蛋黄是鸡蛋中的黄色部分. 2. One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell. 卵黄系带鸡蛋内将蛋黄和蛋壳任一端的内膜连接的两个螺旋的带状组织之一